P0455 on a Volvo: Causes, Fixes & Repair Cost

🟢 Low severity · drivable

Safe to drive — this is an emissions leak, not an engine problem. Fix it before your next emissions test.

What P0455 means on a Volvo

On a Volvo, P0455 means the EVAP system has a large leak and fuel vapors are escaping. The car will still run and drive normally, so the check engine light is usually the only sign. It's an emissions issue, not a drivability issue.

Is P0455 common on Volvos?

P0455 shows up on Volvos like the XC60, XC90, S60, and V60, most often on older models where rubber EVAP hoses have dried out. A loose or worn gas cap is the most common trigger, followed by cracked hoses and aging purge valves. Cold climates can make the problem show up more often.

Commonly reported on: XC60, XC90, S60, V60.

Symptoms

Check engine light is on
Possible faint fuel smell
Usually no driving symptoms

Common causes

most common: Loose, missing, or damaged gas cap
common: Cracked or dried-out EVAP hose
common: Faulty EVAP purge or vent valve
less common: Crack in the charcoal canister

How to fix it

Fix	DIY?	Typical cost
Tighten or replace the gas cap	Yes	$10–30
Inspect and replace cracked EVAP hoses	Yes	$15–80
Have a smoke test performed to find the exact leak	Mechanic	$50–150
Replace a faulty purge or vent valve	Yes	$40–160